Loading...
1/*
2 * ds.c -- 16-bit PCMCIA core support
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 * The initial developer of the original code is David A. Hinds
9 * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
10 * are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
11 *
12 * (C) 1999 David A. Hinds
13 * (C) 2003 - 2010 Dominik Brodowski
14 */
15
16#include <linux/kernel.h>
17#include <linux/module.h>
18#include <linux/init.h>
19#include <linux/errno.h>
20#include <linux/list.h>
21#include <linux/delay.h>
22#include <linux/workqueue.h>
23#include <linux/crc32.h>
24#include <linux/firmware.h>
25#include <linux/kref.h>
26#include <linux/dma-mapping.h>
27#include <linux/slab.h>
28
29#include <pcmcia/cistpl.h>
30#include <pcmcia/ds.h>
31#include <pcmcia/ss.h>
32
33#include "cs_internal.h"
34
35/*====================================================================*/
36
37/* Module parameters */
38
39MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
40MODULE_DESCRIPTION("PCMCIA Driver Services");
41MODULE_LICENSE("GPL");
42
43
44/*====================================================================*/
45
46static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
47{
48 const struct pcmcia_device_id *did = p_drv->id_table;
49 unsigned int i;
50 u32 hash;
51
52 if (!p_drv->probe || !p_drv->remove)
53 printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback "
54 "function\n", p_drv->name);
55
56 while (did && did->match_flags) {
57 for (i = 0; i < 4; i++) {
58 if (!did->prod_id[i])
59 continue;
60
61 hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
62 if (hash == did->prod_id_hash[i])
63 continue;
64
65 printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
66 "product string \"%s\": is 0x%x, should "
67 "be 0x%x\n", p_drv->name, did->prod_id[i],
68 did->prod_id_hash[i], hash);
69 printk(KERN_DEBUG "pcmcia: see "
70 "Documentation/pcmcia/devicetable.txt for "
71 "details\n");
72 }
73 did++;
74 }
75
76 return;
77}
78
79
80/*======================================================================*/
81
82
83struct pcmcia_dynid {
84 struct list_head node;
85 struct pcmcia_device_id id;
86};
87
88/**
89 * pcmcia_store_new_id - add a new PCMCIA device ID to this driver and re-probe devices
90 * @driver: target device driver
91 * @buf: buffer for scanning device ID data
92 * @count: input size
93 *
94 * Adds a new dynamic PCMCIA device ID to this driver,
95 * and causes the driver to probe for all devices again.
96 */
97static ssize_t
98pcmcia_store_new_id(struct device_driver *driver, const char *buf, size_t count)
99{
100 struct pcmcia_dynid *dynid;
101 struct pcmcia_driver *pdrv = to_pcmcia_drv(driver);
102 __u16 match_flags, manf_id, card_id;
103 __u8 func_id, function, device_no;
104 __u32 prod_id_hash[4] = {0, 0, 0, 0};
105 int fields = 0;
106 int retval = 0;
107
108 fields = sscanf(buf, "%hx %hx %hx %hhx %hhx %hhx %x %x %x %x",
109 &match_flags, &manf_id, &card_id, &func_id, &function, &device_no,
110 &prod_id_hash[0], &prod_id_hash[1], &prod_id_hash[2], &prod_id_hash[3]);
111 if (fields < 6)
112 return -EINVAL;
113
114 dynid = kzalloc(sizeof(struct pcmcia_dynid), GFP_KERNEL);
115 if (!dynid)
116 return -ENOMEM;
117
118 dynid->id.match_flags = match_flags;
119 dynid->id.manf_id = manf_id;
120 dynid->id.card_id = card_id;
121 dynid->id.func_id = func_id;
122 dynid->id.function = function;
123 dynid->id.device_no = device_no;
124 memcpy(dynid->id.prod_id_hash, prod_id_hash, sizeof(__u32) * 4);
125
126 mutex_lock(&pdrv->dynids.lock);
127 list_add_tail(&dynid->node, &pdrv->dynids.list);
128 mutex_unlock(&pdrv->dynids.lock);
129
130 retval = driver_attach(&pdrv->drv);
131
132 if (retval)
133 return retval;
134 return count;
135}
136static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id);
137
138static void
139pcmcia_free_dynids(struct pcmcia_driver *drv)
140{
141 struct pcmcia_dynid *dynid, *n;
142
143 mutex_lock(&drv->dynids.lock);
144 list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
145 list_del(&dynid->node);
146 kfree(dynid);
147 }
148 mutex_unlock(&drv->dynids.lock);
149}
150
151static int
152pcmcia_create_newid_file(struct pcmcia_driver *drv)
153{
154 int error = 0;
155 if (drv->probe != NULL)
156 error = driver_create_file(&drv->drv, &driver_attr_new_id);
157 return error;
158}
159
160static void
161pcmcia_remove_newid_file(struct pcmcia_driver *drv)
162{
163 driver_remove_file(&drv->drv, &driver_attr_new_id);
164}
165
166/**
167 * pcmcia_register_driver - register a PCMCIA driver with the bus core
168 * @driver: the &driver being registered
169 *
170 * Registers a PCMCIA driver with the PCMCIA bus core.
171 */
172int pcmcia_register_driver(struct pcmcia_driver *driver)
173{
174 int error;
175
176 if (!driver)
177 return -EINVAL;
178
179 pcmcia_check_driver(driver);
180
181 /* initialize common fields */
182 driver->drv.bus = &pcmcia_bus_type;
183 driver->drv.owner = driver->owner;
184 driver->drv.name = driver->name;
185 mutex_init(&driver->dynids.lock);
186 INIT_LIST_HEAD(&driver->dynids.list);
187
188 pr_debug("registering driver %s\n", driver->name);
189
190 error = driver_register(&driver->drv);
191 if (error < 0)
192 return error;
193
194 error = pcmcia_create_newid_file(driver);
195 if (error)
196 driver_unregister(&driver->drv);
197
198 return error;
199}
200EXPORT_SYMBOL(pcmcia_register_driver);
201
202/**
203 * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
204 * @driver: the &driver being unregistered
205 */
206void pcmcia_unregister_driver(struct pcmcia_driver *driver)
207{
208 pr_debug("unregistering driver %s\n", driver->name);
209 pcmcia_remove_newid_file(driver);
210 driver_unregister(&driver->drv);
211 pcmcia_free_dynids(driver);
212}
213EXPORT_SYMBOL(pcmcia_unregister_driver);
214
215
216/* pcmcia_device handling */
217
218static struct pcmcia_device *pcmcia_get_dev(struct pcmcia_device *p_dev)
219{
220 struct device *tmp_dev;
221 tmp_dev = get_device(&p_dev->dev);
222 if (!tmp_dev)
223 return NULL;
224 return to_pcmcia_dev(tmp_dev);
225}
226
227static void pcmcia_put_dev(struct pcmcia_device *p_dev)
228{
229 if (p_dev)
230 put_device(&p_dev->dev);
231}
232
233static void pcmcia_release_function(struct kref *ref)
234{
235 struct config_t *c = container_of(ref, struct config_t, ref);
236 pr_debug("releasing config_t\n");
237 kfree(c);
238}
239
240static void pcmcia_release_dev(struct device *dev)
241{
242 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
243 int i;
244 dev_dbg(dev, "releasing device\n");
245 pcmcia_put_socket(p_dev->socket);
246 for (i = 0; i < 4; i++)
247 kfree(p_dev->prod_id[i]);
248 kfree(p_dev->devname);
249 kref_put(&p_dev->function_config->ref, pcmcia_release_function);
250 kfree(p_dev);
251}
252
253
254static int pcmcia_device_probe(struct device *dev)
255{
256 struct pcmcia_device *p_dev;
257 struct pcmcia_driver *p_drv;
258 struct pcmcia_socket *s;
259 cistpl_config_t cis_config;
260 int ret = 0;
261
262 dev = get_device(dev);
263 if (!dev)
264 return -ENODEV;
265
266 p_dev = to_pcmcia_dev(dev);
267 p_drv = to_pcmcia_drv(dev->driver);
268 s = p_dev->socket;
269
270 dev_dbg(dev, "trying to bind to %s\n", p_drv->name);
271
272 if ((!p_drv->probe) || (!p_dev->function_config) ||
273 (!try_module_get(p_drv->owner))) {
274 ret = -EINVAL;
275 goto put_dev;
276 }
277
278 /* set up some more device information */
279 ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG,
280 &cis_config);
281 if (!ret) {
282 p_dev->config_base = cis_config.base;
283 p_dev->config_regs = cis_config.rmask[0];
284 dev_dbg(dev, "base %x, regs %x", p_dev->config_base,
285 p_dev->config_regs);
286 } else {
287 dev_printk(KERN_INFO, dev,
288 "pcmcia: could not parse base and rmask0 of CIS\n");
289 p_dev->config_base = 0;
290 p_dev->config_regs = 0;
291 }
292
293 ret = p_drv->probe(p_dev);
294 if (ret) {
295 dev_dbg(dev, "binding to %s failed with %d\n",
296 p_drv->name, ret);
297 goto put_module;
298 }
299 dev_dbg(dev, "%s bound: Vpp %d.%d, idx %x, IRQ %d", p_drv->name,
300 p_dev->vpp/10, p_dev->vpp%10, p_dev->config_index, p_dev->irq);
301 dev_dbg(dev, "resources: ioport %pR %pR iomem %pR %pR %pR",
302 p_dev->resource[0], p_dev->resource[1], p_dev->resource[2],
303 p_dev->resource[3], p_dev->resource[4]);
304
305 mutex_lock(&s->ops_mutex);
306 if ((s->pcmcia_pfc) &&
307 (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
308 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
309 mutex_unlock(&s->ops_mutex);
310
311put_module:
312 if (ret)
313 module_put(p_drv->owner);
314put_dev:
315 if (ret)
316 put_device(dev);
317 return ret;
318}
319
320
321/*
322 * Removes a PCMCIA card from the device tree and socket list.
323 */
324static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover)
325{
326 struct pcmcia_device *p_dev;
327 struct pcmcia_device *tmp;
328
329 dev_dbg(leftover ? &leftover->dev : &s->dev,
330 "pcmcia_card_remove(%d) %s\n", s->sock,
331 leftover ? leftover->devname : "");
332
333 mutex_lock(&s->ops_mutex);
334 if (!leftover)
335 s->device_count = 0;
336 else
337 s->device_count = 1;
338 mutex_unlock(&s->ops_mutex);
339
340 /* unregister all pcmcia_devices registered with this socket, except leftover */
341 list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) {
342 if (p_dev == leftover)
343 continue;
344
345 mutex_lock(&s->ops_mutex);
346 list_del(&p_dev->socket_device_list);
347 mutex_unlock(&s->ops_mutex);
348
349 dev_dbg(&p_dev->dev, "unregistering device\n");
350 device_unregister(&p_dev->dev);
351 }
352
353 return;
354}
355
356static int pcmcia_device_remove(struct device *dev)
357{
358 struct pcmcia_device *p_dev;
359 struct pcmcia_driver *p_drv;
360 int i;
361
362 p_dev = to_pcmcia_dev(dev);
363 p_drv = to_pcmcia_drv(dev->driver);
364
365 dev_dbg(dev, "removing device\n");
366
367 /* If we're removing the primary module driving a
368 * pseudo multi-function card, we need to unbind
369 * all devices
370 */
371 if ((p_dev->socket->pcmcia_pfc) &&
372 (p_dev->socket->device_count > 0) &&
373 (p_dev->device_no == 0))
374 pcmcia_card_remove(p_dev->socket, p_dev);
375
376 /* detach the "instance" */
377 if (!p_drv)
378 return 0;
379
380 if (p_drv->remove)
381 p_drv->remove(p_dev);
382
383 /* check for proper unloading */
384 if (p_dev->_irq || p_dev->_io || p_dev->_locked)
385 dev_printk(KERN_INFO, dev,
386 "pcmcia: driver %s did not release config properly\n",
387 p_drv->name);
388
389 for (i = 0; i < MAX_WIN; i++)
390 if (p_dev->_win & CLIENT_WIN_REQ(i))
391 dev_printk(KERN_INFO, dev,
392 "pcmcia: driver %s did not release window properly\n",
393 p_drv->name);
394
395 /* references from pcmcia_probe_device */
396 pcmcia_put_dev(p_dev);
397 module_put(p_drv->owner);
398
399 return 0;
400}
401
402
403/*
404 * pcmcia_device_query -- determine information about a pcmcia device
405 */
406static int pcmcia_device_query(struct pcmcia_device *p_dev)
407{
408 cistpl_manfid_t manf_id;
409 cistpl_funcid_t func_id;
410 cistpl_vers_1_t *vers1;
411 unsigned int i;
412
413 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
414 if (!vers1)
415 return -ENOMEM;
416
417 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL,
418 CISTPL_MANFID, &manf_id)) {
419 mutex_lock(&p_dev->socket->ops_mutex);
420 p_dev->manf_id = manf_id.manf;
421 p_dev->card_id = manf_id.card;
422 p_dev->has_manf_id = 1;
423 p_dev->has_card_id = 1;
424 mutex_unlock(&p_dev->socket->ops_mutex);
425 }
426
427 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
428 CISTPL_FUNCID, &func_id)) {
429 mutex_lock(&p_dev->socket->ops_mutex);
430 p_dev->func_id = func_id.func;
431 p_dev->has_func_id = 1;
432 mutex_unlock(&p_dev->socket->ops_mutex);
433 } else {
434 /* rule of thumb: cards with no FUNCID, but with
435 * common memory device geometry information, are
436 * probably memory cards (from pcmcia-cs) */
437 cistpl_device_geo_t *devgeo;
438
439 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
440 if (!devgeo) {
441 kfree(vers1);
442 return -ENOMEM;
443 }
444 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
445 CISTPL_DEVICE_GEO, devgeo)) {
446 dev_dbg(&p_dev->dev,
447 "mem device geometry probably means "
448 "FUNCID_MEMORY\n");
449 mutex_lock(&p_dev->socket->ops_mutex);
450 p_dev->func_id = CISTPL_FUNCID_MEMORY;
451 p_dev->has_func_id = 1;
452 mutex_unlock(&p_dev->socket->ops_mutex);
453 }
454 kfree(devgeo);
455 }
456
457 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, CISTPL_VERS_1,
458 vers1)) {
459 mutex_lock(&p_dev->socket->ops_mutex);
460 for (i = 0; i < min_t(unsigned int, 4, vers1->ns); i++) {
461 char *tmp;
462 unsigned int length;
463 char *new;
464
465 tmp = vers1->str + vers1->ofs[i];
466
467 length = strlen(tmp) + 1;
468 if ((length < 2) || (length > 255))
469 continue;
470
471 new = kmalloc(sizeof(char) * length, GFP_KERNEL);
472 if (!new)
473 continue;
474
475 new = strncpy(new, tmp, length);
476
477 tmp = p_dev->prod_id[i];
478 p_dev->prod_id[i] = new;
479 kfree(tmp);
480 }
481 mutex_unlock(&p_dev->socket->ops_mutex);
482 }
483
484 kfree(vers1);
485 return 0;
486}
487
488
489static struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s,
490 unsigned int function)
491{
492 struct pcmcia_device *p_dev, *tmp_dev;
493 int i;
494
495 s = pcmcia_get_socket(s);
496 if (!s)
497 return NULL;
498
499 pr_debug("adding device to %d, function %d\n", s->sock, function);
500
501 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
502 if (!p_dev)
503 goto err_put;
504
505 mutex_lock(&s->ops_mutex);
506 p_dev->device_no = (s->device_count++);
507 mutex_unlock(&s->ops_mutex);
508
509 /* max of 2 PFC devices */
510 if ((p_dev->device_no >= 2) && (function == 0))
511 goto err_free;
512
513 /* max of 4 devices overall */
514 if (p_dev->device_no >= 4)
515 goto err_free;
516
517 p_dev->socket = s;
518 p_dev->func = function;
519
520 p_dev->dev.bus = &pcmcia_bus_type;
521 p_dev->dev.parent = s->dev.parent;
522 p_dev->dev.release = pcmcia_release_dev;
523 /* by default don't allow DMA */
524 p_dev->dma_mask = DMA_MASK_NONE;
525 p_dev->dev.dma_mask = &p_dev->dma_mask;
526 dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no);
527 if (!dev_name(&p_dev->dev))
528 goto err_free;
529 p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev));
530 if (!p_dev->devname)
531 goto err_free;
532 dev_dbg(&p_dev->dev, "devname is %s\n", p_dev->devname);
533
534 mutex_lock(&s->ops_mutex);
535
536 /*
537 * p_dev->function_config must be the same for all card functions.
538 * Note that this is serialized by ops_mutex, so that only one
539 * such struct will be created.
540 */
541 list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
542 if (p_dev->func == tmp_dev->func) {
543 p_dev->function_config = tmp_dev->function_config;
544 p_dev->irq = tmp_dev->irq;
545 kref_get(&p_dev->function_config->ref);
546 }
547
548 /* Add to the list in pcmcia_bus_socket */
549 list_add(&p_dev->socket_device_list, &s->devices_list);
550
551 if (pcmcia_setup_irq(p_dev))
552 dev_warn(&p_dev->dev,
553 "IRQ setup failed -- device might not work\n");
554
555 if (!p_dev->function_config) {
556 config_t *c;
557 dev_dbg(&p_dev->dev, "creating config_t\n");
558 c = kzalloc(sizeof(struct config_t), GFP_KERNEL);
559 if (!c) {
560 mutex_unlock(&s->ops_mutex);
561 goto err_unreg;
562 }
563 p_dev->function_config = c;
564 kref_init(&c->ref);
565 for (i = 0; i < MAX_IO_WIN; i++) {
566 c->io[i].name = p_dev->devname;
567 c->io[i].flags = IORESOURCE_IO;
568 }
569 for (i = 0; i< MAX_WIN; i++) {
570 c->mem[i].name = p_dev->devname;
571 c->mem[i].flags = IORESOURCE_MEM;
572 }
573 }
574 for (i = 0; i < MAX_IO_WIN; i++)
575 p_dev->resource[i] = &p_dev->function_config->io[i];
576 for (; i < (MAX_IO_WIN + MAX_WIN); i++)
577 p_dev->resource[i] = &p_dev->function_config->mem[i-MAX_IO_WIN];
578
579 mutex_unlock(&s->ops_mutex);
580
581 dev_printk(KERN_NOTICE, &p_dev->dev,
582 "pcmcia: registering new device %s (IRQ: %d)\n",
583 p_dev->devname, p_dev->irq);
584
585 pcmcia_device_query(p_dev);
586
587 if (device_register(&p_dev->dev))
588 goto err_unreg;
589
590 return p_dev;
591
592 err_unreg:
593 mutex_lock(&s->ops_mutex);
594 list_del(&p_dev->socket_device_list);
595 mutex_unlock(&s->ops_mutex);
596
597 err_free:
598 mutex_lock(&s->ops_mutex);
599 s->device_count--;
600 mutex_unlock(&s->ops_mutex);
601
602 for (i = 0; i < 4; i++)
603 kfree(p_dev->prod_id[i]);
604 kfree(p_dev->devname);
605 kfree(p_dev);
606 err_put:
607 pcmcia_put_socket(s);
608
609 return NULL;
610}
611
612
613static int pcmcia_card_add(struct pcmcia_socket *s)
614{
615 cistpl_longlink_mfc_t mfc;
616 unsigned int no_funcs, i, no_chains;
617 int ret = -EAGAIN;
618
619 mutex_lock(&s->ops_mutex);
620 if (!(s->resource_setup_done)) {
621 dev_dbg(&s->dev,
622 "no resources available, delaying card_add\n");
623 mutex_unlock(&s->ops_mutex);
624 return -EAGAIN; /* try again, but later... */
625 }
626
627 if (pcmcia_validate_mem(s)) {
628 dev_dbg(&s->dev, "validating mem resources failed, "
629 "delaying card_add\n");
630 mutex_unlock(&s->ops_mutex);
631 return -EAGAIN; /* try again, but later... */
632 }
633 mutex_unlock(&s->ops_mutex);
634
635 ret = pccard_validate_cis(s, &no_chains);
636 if (ret || !no_chains) {
637 dev_dbg(&s->dev, "invalid CIS or invalid resources\n");
638 return -ENODEV;
639 }
640
641 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
642 no_funcs = mfc.nfn;
643 else
644 no_funcs = 1;
645 s->functions = no_funcs;
646
647 for (i = 0; i < no_funcs; i++)
648 pcmcia_device_add(s, i);
649
650 return ret;
651}
652
653
654static int pcmcia_requery_callback(struct device *dev, void * _data)
655{
656 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
657 if (!p_dev->dev.driver) {
658 dev_dbg(dev, "update device information\n");
659 pcmcia_device_query(p_dev);
660 }
661
662 return 0;
663}
664
665
666static void pcmcia_requery(struct pcmcia_socket *s)
667{
668 int has_pfc;
669
670 if (s->functions == 0) {
671 pcmcia_card_add(s);
672 return;
673 }
674
675 /* some device information might have changed because of a CIS
676 * update or because we can finally read it correctly... so
677 * determine it again, overwriting old values if necessary. */
678 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery_callback);
679
680 /* if the CIS changed, we need to check whether the number of
681 * functions changed. */
682 if (s->fake_cis) {
683 int old_funcs, new_funcs;
684 cistpl_longlink_mfc_t mfc;
685
686 /* does this cis override add or remove functions? */
687 old_funcs = s->functions;
688
689 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
690 &mfc))
691 new_funcs = mfc.nfn;
692 else
693 new_funcs = 1;
694 if (old_funcs != new_funcs) {
695 /* we need to re-start */
696 pcmcia_card_remove(s, NULL);
697 s->functions = 0;
698 pcmcia_card_add(s);
699 }
700 }
701
702 /* If the PCMCIA device consists of two pseudo devices,
703 * call pcmcia_device_add() -- which will fail if both
704 * devices are already registered. */
705 mutex_lock(&s->ops_mutex);
706 has_pfc = s->pcmcia_pfc;
707 mutex_unlock(&s->ops_mutex);
708 if (has_pfc)
709 pcmcia_device_add(s, 0);
710
711 /* we re-scan all devices, not just the ones connected to this
712 * socket. This does not matter, though. */
713 if (bus_rescan_devices(&pcmcia_bus_type))
714 dev_warn(&s->dev, "rescanning the bus failed\n");
715}
716
717
718#ifdef CONFIG_PCMCIA_LOAD_CIS
719
720/**
721 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
722 * @dev: the pcmcia device which needs a CIS override
723 * @filename: requested filename in /lib/firmware/
724 *
725 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
726 * the one provided by the card is broken. The firmware files reside in
727 * /lib/firmware/ in userspace.
728 */
729static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
730{
731 struct pcmcia_socket *s = dev->socket;
732 const struct firmware *fw;
733 int ret = -ENOMEM;
734 cistpl_longlink_mfc_t mfc;
735 int old_funcs, new_funcs = 1;
736
737 if (!filename)
738 return -EINVAL;
739
740 dev_dbg(&dev->dev, "trying to load CIS file %s\n", filename);
741
742 if (request_firmware(&fw, filename, &dev->dev) == 0) {
743 if (fw->size >= CISTPL_MAX_CIS_SIZE) {
744 ret = -EINVAL;
745 dev_printk(KERN_ERR, &dev->dev,
746 "pcmcia: CIS override is too big\n");
747 goto release;
748 }
749
750 if (!pcmcia_replace_cis(s, fw->data, fw->size))
751 ret = 0;
752 else {
753 dev_printk(KERN_ERR, &dev->dev,
754 "pcmcia: CIS override failed\n");
755 goto release;
756 }
757
758 /* we need to re-start if the number of functions changed */
759 old_funcs = s->functions;
760 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
761 &mfc))
762 new_funcs = mfc.nfn;
763
764 if (old_funcs != new_funcs)
765 ret = -EBUSY;
766
767 /* update information */
768 pcmcia_device_query(dev);
769
770 /* requery (as number of functions might have changed) */
771 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
772 }
773 release:
774 release_firmware(fw);
775
776 return ret;
777}
778
779#else /* !CONFIG_PCMCIA_LOAD_CIS */
780
781static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
782{
783 return -ENODEV;
784}
785
786#endif
787
788
789static inline int pcmcia_devmatch(struct pcmcia_device *dev,
790 const struct pcmcia_device_id *did)
791{
792 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
793 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
794 return 0;
795 }
796
797 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
798 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
799 return 0;
800 }
801
802 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
803 if (dev->func != did->function)
804 return 0;
805 }
806
807 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
808 if (!dev->prod_id[0])
809 return 0;
810 if (strcmp(did->prod_id[0], dev->prod_id[0]))
811 return 0;
812 }
813
814 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
815 if (!dev->prod_id[1])
816 return 0;
817 if (strcmp(did->prod_id[1], dev->prod_id[1]))
818 return 0;
819 }
820
821 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
822 if (!dev->prod_id[2])
823 return 0;
824 if (strcmp(did->prod_id[2], dev->prod_id[2]))
825 return 0;
826 }
827
828 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
829 if (!dev->prod_id[3])
830 return 0;
831 if (strcmp(did->prod_id[3], dev->prod_id[3]))
832 return 0;
833 }
834
835 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
836 dev_dbg(&dev->dev, "this is a pseudo-multi-function device\n");
837 mutex_lock(&dev->socket->ops_mutex);
838 dev->socket->pcmcia_pfc = 1;
839 mutex_unlock(&dev->socket->ops_mutex);
840 if (dev->device_no != did->device_no)
841 return 0;
842 }
843
844 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
845 int ret;
846
847 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
848 return 0;
849
850 /* if this is a pseudo-multi-function device,
851 * we need explicit matches */
852 if (dev->socket->pcmcia_pfc)
853 return 0;
854 if (dev->device_no)
855 return 0;
856
857 /* also, FUNC_ID matching needs to be activated by userspace
858 * after it has re-checked that there is no possible module
859 * with a prod_id/manf_id/card_id match.
860 */
861 mutex_lock(&dev->socket->ops_mutex);
862 ret = dev->allow_func_id_match;
863 mutex_unlock(&dev->socket->ops_mutex);
864
865 if (!ret) {
866 dev_dbg(&dev->dev,
867 "skipping FUNC_ID match until userspace ACK\n");
868 return 0;
869 }
870 }
871
872 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
873 dev_dbg(&dev->dev, "device needs a fake CIS\n");
874 if (!dev->socket->fake_cis)
875 if (pcmcia_load_firmware(dev, did->cisfile))
876 return 0;
877 }
878
879 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
880 int i;
881 for (i = 0; i < 4; i++)
882 if (dev->prod_id[i])
883 return 0;
884 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
885 return 0;
886 }
887
888 return 1;
889}
890
891
892static int pcmcia_bus_match(struct device *dev, struct device_driver *drv)
893{
894 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
895 struct pcmcia_driver *p_drv = to_pcmcia_drv(drv);
896 const struct pcmcia_device_id *did = p_drv->id_table;
897 struct pcmcia_dynid *dynid;
898
899 /* match dynamic devices first */
900 mutex_lock(&p_drv->dynids.lock);
901 list_for_each_entry(dynid, &p_drv->dynids.list, node) {
902 dev_dbg(dev, "trying to match to %s\n", drv->name);
903 if (pcmcia_devmatch(p_dev, &dynid->id)) {
904 dev_dbg(dev, "matched to %s\n", drv->name);
905 mutex_unlock(&p_drv->dynids.lock);
906 return 1;
907 }
908 }
909 mutex_unlock(&p_drv->dynids.lock);
910
911 while (did && did->match_flags) {
912 dev_dbg(dev, "trying to match to %s\n", drv->name);
913 if (pcmcia_devmatch(p_dev, did)) {
914 dev_dbg(dev, "matched to %s\n", drv->name);
915 return 1;
916 }
917 did++;
918 }
919
920 return 0;
921}
922
923#ifdef CONFIG_HOTPLUG
924
925static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
926{
927 struct pcmcia_device *p_dev;
928 int i;
929 u32 hash[4] = { 0, 0, 0, 0};
930
931 if (!dev)
932 return -ENODEV;
933
934 p_dev = to_pcmcia_dev(dev);
935
936 /* calculate hashes */
937 for (i = 0; i < 4; i++) {
938 if (!p_dev->prod_id[i])
939 continue;
940 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
941 }
942
943 if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
944 return -ENOMEM;
945
946 if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
947 return -ENOMEM;
948
949 if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
950 "pa%08Xpb%08Xpc%08Xpd%08X",
951 p_dev->has_manf_id ? p_dev->manf_id : 0,
952 p_dev->has_card_id ? p_dev->card_id : 0,
953 p_dev->has_func_id ? p_dev->func_id : 0,
954 p_dev->func,
955 p_dev->device_no,
956 hash[0],
957 hash[1],
958 hash[2],
959 hash[3]))
960 return -ENOMEM;
961
962 return 0;
963}
964
965#else
966
967static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
968{
969 return -ENODEV;
970}
971
972#endif
973
974/************************ runtime PM support ***************************/
975
976static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
977static int pcmcia_dev_resume(struct device *dev);
978
979static int runtime_suspend(struct device *dev)
980{
981 int rc;
982
983 device_lock(dev);
984 rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
985 device_unlock(dev);
986 return rc;
987}
988
989static int runtime_resume(struct device *dev)
990{
991 int rc;
992
993 device_lock(dev);
994 rc = pcmcia_dev_resume(dev);
995 device_unlock(dev);
996 return rc;
997}
998
999/************************ per-device sysfs output ***************************/
1000
1001#define pcmcia_device_attr(field, test, format) \
1002static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1003{ \
1004 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1005 return p_dev->test ? sprintf(buf, format, p_dev->field) : -ENODEV; \
1006}
1007
1008#define pcmcia_device_stringattr(name, field) \
1009static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1010{ \
1011 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1012 return p_dev->field ? sprintf(buf, "%s\n", p_dev->field) : -ENODEV; \
1013}
1014
1015pcmcia_device_attr(func, socket, "0x%02x\n");
1016pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1017pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1018pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1019pcmcia_device_stringattr(prod_id1, prod_id[0]);
1020pcmcia_device_stringattr(prod_id2, prod_id[1]);
1021pcmcia_device_stringattr(prod_id3, prod_id[2]);
1022pcmcia_device_stringattr(prod_id4, prod_id[3]);
1023
1024static ssize_t pcmcia_show_resources(struct device *dev,
1025 struct device_attribute *attr, char *buf)
1026{
1027 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1028 char *str = buf;
1029 int i;
1030
1031 for (i = 0; i < PCMCIA_NUM_RESOURCES; i++)
1032 str += sprintf(str, "%pr\n", p_dev->resource[i]);
1033
1034 return str - buf;
1035}
1036
1037static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
1038{
1039 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1040
1041 if (p_dev->suspended)
1042 return sprintf(buf, "off\n");
1043 else
1044 return sprintf(buf, "on\n");
1045}
1046
1047static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
1048 const char *buf, size_t count)
1049{
1050 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1051 int ret = 0;
1052
1053 if (!count)
1054 return -EINVAL;
1055
1056 if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1057 ret = runtime_suspend(dev);
1058 else if (p_dev->suspended && !strncmp(buf, "on", 2))
1059 ret = runtime_resume(dev);
1060
1061 return ret ? ret : count;
1062}
1063
1064
1065static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1066{
1067 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1068 int i;
1069 u32 hash[4] = { 0, 0, 0, 0};
1070
1071 /* calculate hashes */
1072 for (i = 0; i < 4; i++) {
1073 if (!p_dev->prod_id[i])
1074 continue;
1075 hash[i] = crc32(0, p_dev->prod_id[i],
1076 strlen(p_dev->prod_id[i]));
1077 }
1078 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1079 "pa%08Xpb%08Xpc%08Xpd%08X\n",
1080 p_dev->has_manf_id ? p_dev->manf_id : 0,
1081 p_dev->has_card_id ? p_dev->card_id : 0,
1082 p_dev->has_func_id ? p_dev->func_id : 0,
1083 p_dev->func, p_dev->device_no,
1084 hash[0], hash[1], hash[2], hash[3]);
1085}
1086
1087static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
1088 struct device_attribute *attr, const char *buf, size_t count)
1089{
1090 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1091
1092 if (!count)
1093 return -EINVAL;
1094
1095 mutex_lock(&p_dev->socket->ops_mutex);
1096 p_dev->allow_func_id_match = 1;
1097 mutex_unlock(&p_dev->socket->ops_mutex);
1098 pcmcia_parse_uevents(p_dev->socket, PCMCIA_UEVENT_REQUERY);
1099
1100 return count;
1101}
1102
1103static struct device_attribute pcmcia_dev_attrs[] = {
1104 __ATTR(function, 0444, func_show, NULL),
1105 __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1106 __ATTR(resources, 0444, pcmcia_show_resources, NULL),
1107 __ATTR_RO(func_id),
1108 __ATTR_RO(manf_id),
1109 __ATTR_RO(card_id),
1110 __ATTR_RO(prod_id1),
1111 __ATTR_RO(prod_id2),
1112 __ATTR_RO(prod_id3),
1113 __ATTR_RO(prod_id4),
1114 __ATTR_RO(modalias),
1115 __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1116 __ATTR_NULL,
1117};
1118
1119/* PM support, also needed for reset */
1120
1121static int pcmcia_dev_suspend(struct device *dev, pm_message_t state)
1122{
1123 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1124 struct pcmcia_driver *p_drv = NULL;
1125 int ret = 0;
1126
1127 mutex_lock(&p_dev->socket->ops_mutex);
1128 if (p_dev->suspended) {
1129 mutex_unlock(&p_dev->socket->ops_mutex);
1130 return 0;
1131 }
1132 p_dev->suspended = 1;
1133 mutex_unlock(&p_dev->socket->ops_mutex);
1134
1135 dev_dbg(dev, "suspending\n");
1136
1137 if (dev->driver)
1138 p_drv = to_pcmcia_drv(dev->driver);
1139
1140 if (!p_drv)
1141 goto out;
1142
1143 if (p_drv->suspend) {
1144 ret = p_drv->suspend(p_dev);
1145 if (ret) {
1146 dev_printk(KERN_ERR, dev,
1147 "pcmcia: device %s (driver %s) did "
1148 "not want to go to sleep (%d)\n",
1149 p_dev->devname, p_drv->name, ret);
1150 mutex_lock(&p_dev->socket->ops_mutex);
1151 p_dev->suspended = 0;
1152 mutex_unlock(&p_dev->socket->ops_mutex);
1153 goto out;
1154 }
1155 }
1156
1157 if (p_dev->device_no == p_dev->func) {
1158 dev_dbg(dev, "releasing configuration\n");
1159 pcmcia_release_configuration(p_dev);
1160 }
1161
1162 out:
1163 return ret;
1164}
1165
1166
1167static int pcmcia_dev_resume(struct device *dev)
1168{
1169 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1170 struct pcmcia_driver *p_drv = NULL;
1171 int ret = 0;
1172
1173 mutex_lock(&p_dev->socket->ops_mutex);
1174 if (!p_dev->suspended) {
1175 mutex_unlock(&p_dev->socket->ops_mutex);
1176 return 0;
1177 }
1178 p_dev->suspended = 0;
1179 mutex_unlock(&p_dev->socket->ops_mutex);
1180
1181 dev_dbg(dev, "resuming\n");
1182
1183 if (dev->driver)
1184 p_drv = to_pcmcia_drv(dev->driver);
1185
1186 if (!p_drv)
1187 goto out;
1188
1189 if (p_dev->device_no == p_dev->func) {
1190 dev_dbg(dev, "requesting configuration\n");
1191 ret = pcmcia_enable_device(p_dev);
1192 if (ret)
1193 goto out;
1194 }
1195
1196 if (p_drv->resume)
1197 ret = p_drv->resume(p_dev);
1198
1199 out:
1200 return ret;
1201}
1202
1203
1204static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1205{
1206 struct pcmcia_socket *skt = _data;
1207 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1208
1209 if (p_dev->socket != skt || p_dev->suspended)
1210 return 0;
1211
1212 return runtime_suspend(dev);
1213}
1214
1215static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1216{
1217 struct pcmcia_socket *skt = _data;
1218 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1219
1220 if (p_dev->socket != skt || !p_dev->suspended)
1221 return 0;
1222
1223 runtime_resume(dev);
1224
1225 return 0;
1226}
1227
1228static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1229{
1230 dev_dbg(&skt->dev, "resuming socket %d\n", skt->sock);
1231 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1232 return 0;
1233}
1234
1235static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1236{
1237 dev_dbg(&skt->dev, "suspending socket %d\n", skt->sock);
1238 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1239 pcmcia_bus_suspend_callback)) {
1240 pcmcia_bus_resume(skt);
1241 return -EIO;
1242 }
1243 return 0;
1244}
1245
1246static int pcmcia_bus_remove(struct pcmcia_socket *skt)
1247{
1248 atomic_set(&skt->present, 0);
1249 pcmcia_card_remove(skt, NULL);
1250
1251 mutex_lock(&skt->ops_mutex);
1252 destroy_cis_cache(skt);
1253 pcmcia_cleanup_irq(skt);
1254 mutex_unlock(&skt->ops_mutex);
1255
1256 return 0;
1257}
1258
1259static int pcmcia_bus_add(struct pcmcia_socket *skt)
1260{
1261 atomic_set(&skt->present, 1);
1262
1263 mutex_lock(&skt->ops_mutex);
1264 skt->pcmcia_pfc = 0;
1265 destroy_cis_cache(skt); /* to be on the safe side... */
1266 mutex_unlock(&skt->ops_mutex);
1267
1268 pcmcia_card_add(skt);
1269
1270 return 0;
1271}
1272
1273static int pcmcia_bus_early_resume(struct pcmcia_socket *skt)
1274{
1275 if (!verify_cis_cache(skt))
1276 return 0;
1277
1278 dev_dbg(&skt->dev, "cis mismatch - different card\n");
1279
1280 /* first, remove the card */
1281 pcmcia_bus_remove(skt);
1282
1283 mutex_lock(&skt->ops_mutex);
1284 destroy_cis_cache(skt);
1285 kfree(skt->fake_cis);
1286 skt->fake_cis = NULL;
1287 skt->functions = 0;
1288 mutex_unlock(&skt->ops_mutex);
1289
1290 /* now, add the new card */
1291 pcmcia_bus_add(skt);
1292 return 0;
1293}
1294
1295
1296/*
1297 * NOTE: This is racy. There's no guarantee the card will still be
1298 * physically present, even if the call to this function returns
1299 * non-NULL. Furthermore, the device driver most likely is unbound
1300 * almost immediately, so the timeframe where pcmcia_dev_present
1301 * returns NULL is probably really really small.
1302 */
1303struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev)
1304{
1305 struct pcmcia_device *p_dev;
1306 struct pcmcia_device *ret = NULL;
1307
1308 p_dev = pcmcia_get_dev(_p_dev);
1309 if (!p_dev)
1310 return NULL;
1311
1312 if (atomic_read(&p_dev->socket->present) != 0)
1313 ret = p_dev;
1314
1315 pcmcia_put_dev(p_dev);
1316 return ret;
1317}
1318EXPORT_SYMBOL(pcmcia_dev_present);
1319
1320
1321static struct pcmcia_callback pcmcia_bus_callback = {
1322 .owner = THIS_MODULE,
1323 .add = pcmcia_bus_add,
1324 .remove = pcmcia_bus_remove,
1325 .requery = pcmcia_requery,
1326 .validate = pccard_validate_cis,
1327 .suspend = pcmcia_bus_suspend,
1328 .early_resume = pcmcia_bus_early_resume,
1329 .resume = pcmcia_bus_resume,
1330};
1331
1332static int __devinit pcmcia_bus_add_socket(struct device *dev,
1333 struct class_interface *class_intf)
1334{
1335 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1336 int ret;
1337
1338 socket = pcmcia_get_socket(socket);
1339 if (!socket) {
1340 dev_printk(KERN_ERR, dev,
1341 "PCMCIA obtaining reference to socket failed\n");
1342 return -ENODEV;
1343 }
1344
1345 ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr);
1346 if (ret) {
1347 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1348 pcmcia_put_socket(socket);
1349 return ret;
1350 }
1351
1352 INIT_LIST_HEAD(&socket->devices_list);
1353 socket->pcmcia_pfc = 0;
1354 socket->device_count = 0;
1355 atomic_set(&socket->present, 0);
1356
1357 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1358 if (ret) {
1359 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1360 pcmcia_put_socket(socket);
1361 return ret;
1362 }
1363
1364 return 0;
1365}
1366
1367static void pcmcia_bus_remove_socket(struct device *dev,
1368 struct class_interface *class_intf)
1369{
1370 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1371
1372 if (!socket)
1373 return;
1374
1375 pccard_register_pcmcia(socket, NULL);
1376
1377 /* unregister any unbound devices */
1378 mutex_lock(&socket->skt_mutex);
1379 pcmcia_card_remove(socket, NULL);
1380 release_cis_mem(socket);
1381 mutex_unlock(&socket->skt_mutex);
1382
1383 sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr);
1384
1385 pcmcia_put_socket(socket);
1386
1387 return;
1388}
1389
1390
1391/* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1392static struct class_interface pcmcia_bus_interface __refdata = {
1393 .class = &pcmcia_socket_class,
1394 .add_dev = &pcmcia_bus_add_socket,
1395 .remove_dev = &pcmcia_bus_remove_socket,
1396};
1397
1398
1399struct bus_type pcmcia_bus_type = {
1400 .name = "pcmcia",
1401 .uevent = pcmcia_bus_uevent,
1402 .match = pcmcia_bus_match,
1403 .dev_attrs = pcmcia_dev_attrs,
1404 .probe = pcmcia_device_probe,
1405 .remove = pcmcia_device_remove,
1406 .suspend = pcmcia_dev_suspend,
1407 .resume = pcmcia_dev_resume,
1408};
1409
1410
1411static int __init init_pcmcia_bus(void)
1412{
1413 int ret;
1414
1415 ret = bus_register(&pcmcia_bus_type);
1416 if (ret < 0) {
1417 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1418 return ret;
1419 }
1420 ret = class_interface_register(&pcmcia_bus_interface);
1421 if (ret < 0) {
1422 printk(KERN_WARNING
1423 "pcmcia: class_interface_register error: %d\n", ret);
1424 bus_unregister(&pcmcia_bus_type);
1425 return ret;
1426 }
1427
1428 return 0;
1429}
1430fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1431 * pcmcia_socket_class is already registered */
1432
1433
1434static void __exit exit_pcmcia_bus(void)
1435{
1436 class_interface_unregister(&pcmcia_bus_interface);
1437
1438 bus_unregister(&pcmcia_bus_type);
1439}
1440module_exit(exit_pcmcia_bus);
1441
1442
1443MODULE_ALIAS("ds");